Metal-filament lamp.



U. RMENAPP.

METAL PILAMENT LAMP.

APPLICATION FILED MAR. 20, 1909.

9592075 n Patented May 24, H210.

FFIGE;

i CARL RUMEI\l'A.l.-"P,` 0F AUGSBURG, GERMANY? METAL-FILAMENT LAI/II?.

assess., f

Specification of Letters Estant. Appcation led'March 20,- 1909.

Patentes May sa', 191e. Serial N0. 84,794*

To all l"whom .it may. eoaeem:

Be itliilown that l, CARL RUMNQ'P', citi-V zen of lussia, residing atAugslolirg Bavaria, Germany, have `imfented. cestam `new andf usefulImprovements nmMetals- Filament Lamps; and I vdo herebylvdeolarex thefollowing to' bea fuil, elear, and exact description ef the izwe'ntieii7such as ,will

'enable others skilled in the art, to Whieh lit appertains te make anduse thefsame.

Most .metal filament lamps, which are capable of being'usedin anyposition, possess 'the 'disadvailtage that two neighboring fila,-

iseitsmay come into Contact and. be fusedl toyreiiei when the lamp isshaken, this being chiefly to the fact that the singlejthreads aearianged eenform'aiply te the surface of a oyiiiuiei, osmore oi' lessparallel to tile axisp' the lamp. in' the ylamp according to the pesentiiijvention this disadvant( e isA rei'neseii by the single lengt is offilament Qa) at different angles to the axis of the lamp, and notasheretoiore conform- .ingto a -eylindrical surface; this arrangement ofthe filaments is attainedby making ,the Wires (5L-Which. serve todistribute thel 'e'urrentfancl towhieh lthesingle lengths of filamentare attached, alternately of different lengths. l

What I claimas my-vivention and desire to secure by Letters Pate11t.is:5

L1A metal jilament' lamp, chargacterized by the'. arrangemelit -oalternately l long and short current distribution .Wii'es 2.Anfiile'andement electric-.lamp ofthe character" desesibed, havinglame'itsuppoi'tiiig arms ,ef varying lengths, liing in .substantiallythe A.same horizontai ane. l

p In testimony Whjereei I hereunto aix .my signature :in the presenceofftwo' witne" CARL if" li mijn om s e N A s( fr 1.4

a" plurality ofl

